The invention of the common communication infrastructure known as the optical telegraph line network was built by whom? MCQ with Answer and Explanation

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The invention of the common communication infrastructure known as the optical telegraph line network was built by whom?

A. Samuel Morse

B. Alexander Graham Bell

C. Claude Chappe

D. Guglielmo Marconi

Answer: Option C

Solution (By JKSSB Mock Tests)

Chappe constructed a successful nationwide semaphore visual optical tower network across France in the 1790s.

This question belongs to: Static General Knowledge Inventions and Discoveries

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Question #1

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The invention of the common kitchen refrigeration insulation system known as the domestic electric refrigerator was scaled by which engineer?

A. Thomas Edison

B. James Dewar

C. Fred W. Wolf and Nathaniel B. Wales

D. Willis Carrier

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Correct Answer: Option C

Explanation:
Wolf invented early air-cooled attachment refrigerator units in 1913, and Wales engineered units that Kelvinator mass-marketed.

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Question #2

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Who discovered the first human virus ever identified, the Yellow Fever virus?

A. Louis Pasteur

B. Robert Koch

C. Dmitri Ivanovsky

D. Walter Reed and his team

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Correct Answer: Option D

Explanation:
The U.S. Army Yellow Fever Commission led by Walter Reed isolated and proved the disease was caused by a filterable virus vector.

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Question #3

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Who invented the first successful gas mask used widely in industrial safety and military applications?

A. Nikola Tesla

B. Garrett Morgan

C. Thomas Edison

D. Alexander Fleming

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Correct Answer: Option B

Explanation:
African-American inventor Garrett Morgan patented the safety hood/smoke protector device in 1914, which laid the foundation for modern gas masks.

This question belongs to: Static General Knowledge Inventions and Discoveries

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